Sheet-metal fish-back for grain-separators.



J. D. WEST, l y SHEET METAL- FISH BACK POB. GRAIN SEPARATORS. AP1 LIOATION FILED SBPTi' 2., 1910.

1,027,365. y PantedMayfzLuwlz.

JosEPH D. WEST, oF DEs MOINES, IOWA.

srrnETfMETAL FISH-BACK Fon eRArN-snrARAT'ons.

Specification of Letters Patent.

PatentedMay a1, 1912.

Application filed September 2, 1910. Serial No. 580,186.

To all whom 'it may concern:

Be it known that I, JOSEPH D. WEST, citi-` zen-of the United States of America, and resident of Des Moines, Polk county, Iowa, have invented a new and useful Sheet- Metal Fish-Back for Grain-Separators, of which the following is a specification.

The object of'this invention is to provide an improved construction for fish-backs of grain separators. l

A further object of Vthis invention is to provide an improved. construction for fishbacks whereby the eifective widt-h of an elevating table in a grain separator may be increase My invention consists in the construction, arrangement' and combination of elements hereinafter set forth, pointed out in my` claim and illustrated by the accompanying drawing, in which Figure 1 is a side elevation of a separat- \ing\and elevating table embodying my invention. Fig. 2 is a plan and Fig. 3 a front end elevation f he same.

The separating a elevating table as shown is constructed of a r lity of paralle] slats 10 extending transverse r. i reof. The slats 10 are laterally inclined on para lel oblique lines longitudinally of the table,

(Fig. 1). The upper margin ofeach slat 10 is iiush with the lower margin of the next' succeeding slat on lines perpendicular to the planes of said slats. The slats 10 are connected by sheet metal sills 11, 12, 13, 14, 15. spaced apart throughout the length of vsaid slats and extending longitudinally` of the table. The sills 11 to 15 inclusive are serrated on their upper margins to correspond with the parallel spaced planes of the y' slats 10 and are provided with semi-'circular lips 16 extending at right angles to opposite sides'of alternate serrations and adapted to be suitably secured to the lower facesY of the Y slats. The sills 11, 12, y13, 14,15 preferably are corrugated longitudinally (Fig. 3) in order to render them stiff and iniexible. Sheet metalfish backs 17 18,19, 20, 21 are provided and are spaced apart above the slats 10 and opposite to the sills 11, 12, 13, 14,' 15 respectively, and extend longitudi- 50 nally of the table. The fish-backs 17 to 2l inclusive are serrated on their lower margins and semi-circular lips 22 are formed at right angles to and on opposite sides of alternate serrations and are suitably secured to the upper faces of the slats 10 opposite to and conjunctivelyv with the lips 16 of the sills. The fish-backs 17, 18, 19, 20, 21 may gradually Vincrease in Width toward the rear end of the table or in the direction in which the slats 10 are inclined, or may vary'in width as desired. Transverse corrugations 23 are formed in the widened portions of said fish-backs in order to stiffen them and reducel their flexibility in respect oflateralv movement. The upper margins of the fishbacks 17, 18, 19, 20, 21 are serrated and the peints of the serrations are in the direction of the upper or rear end portions of said fish-backs.

The table is adapted to be suspended in any desired manner within a grain separator and may be inclined upwardly toward its rear end portion, or in the direction of the inclination of the slats 10 and the ser- 75 ra'' s of the various sh-backs. A longil larocating motion is imparted to the table in ny desired manner, andV threshed grain fa i on the lower end portion thereof from thef'cy 'n er of the sepa- 8,0 rator is sifted and further separ L' 1.`

It is the function of the inclined s 10 g and the serrated'fish-backs to carry Vstra v upwardly along the table to other carrie1\ (not shown), while grain and chaff falls i between said `slats upon other separating devices (not shown). f The construction of the fish-backs of sheet metal adds materially to the effective widthV of the elevating table,'being relatively nar- 90 row, and the straw is not easily lodgedL 0r choked between them. They also are more durable than when made of wood and this construction provides an effective method for separating the threshed grain from the margins of said sh-backs and means for straw. securing each of said lips to said slats. lo I claim as my invention- Signed by me at Des Moines, Iowa, this In an elevating table Jfor grain separators, 23d day of May, 1910. 5 a sifting and feeding bottom formed from JOSEPH D. WEST.

inclined slats, sheet metal sh-backs eXtend- Witnesses: ing longitudinally thereof and formed With S. C. SWEET, toothed upper margins, lips on the lower EARL M. SINCLAIR.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

